#include <DHT.h>
#include <LiquidCrystal_I2C.h>

#define DHTPIN 2
#define DHTTYPE DHT22
#define ledPin 9
#define buzzer 8

DHT dht(DHTPIN, DHTTYPE);

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  Serial.begin(900);
  dht.begin();
  lcd.init();
  lcd.backlight();
  pinMode(ledPin, OUTPUT);
  pinMode(buzzer, OUTPUT);
}

void loop() {
  float temperature = dht.readTemperature();

  lcd.setCursor(0, 0);
  lcd.print("Alarm Kebakaran");
  lcd.scrollDisplayLeft();

  lcd.setCursor(0, 1);
  lcd.print("Suhu: ");
  lcd.print(temperature);
  lcd.print("C");

  if (temperature > 40) {
    lcd.clear();
    lcd.setCursor(0, 1);
    lcd.print("KEBAKARAN!!!");
    tone(buzzer, 100);
    blinkLED();
    delay(1000);
  } else {
    digitalWrite(ledPin, LOW);
  }

  Serial.print("Suhu: ");
  Serial.print(temperature);
  Serial.println("C");
  delay(2000);
}

void blinkLED() {
  for (;;) {
    digitalWrite(ledPin, HIGH);
    delay(500);
    digitalWrite(ledPin, LOW);
    delay(500);
  }
}